642 E. O. ULRICH INDEX TO "REVISION OF PALEOZOIC SYSTEMS" 



Page Plate 



Girardeau limestone 424, 530, 536 28 



Glacial periods 352 



Glaciation, Cambrian 351, 352 



Pennsylvanian 352 



Glauconite sandstone of Baltic region 527 



Glenerie • • 28 



Glen Park fauna 517 



limestone 426 29 



Glen wood shale • • 27 



Glossograptus hystrix Rued 678 



Gondwana land 397 



Gonioceras 503 



Goniophyllum 501 



Gower stage . . 28 



Grabau, A. W., on regressive overlap 428 



sedimentary overlap 330 



Gradational and lithological criteria 467 



Gradational criteria, Deductions based on 477 ' . . 



Grainger shale, Upper . . 29 



Grand Falls chert 29 



Grand Tower limestone •. 426, 509 28 



Graptolite shales of Nevada 676 



Graptolites as evidence on currents in continental seas 371 



Mode of distribution of 358 



Pelagic existence of 675 



Value in intercontinental correlation of 517 



Gratz shale 416, 569 27 



Gray limestone 27 



Greenbrier limestone 563 29 



Greencastle section of Pennsylvania 322 



Greenfield 28 



Green Pond Mountain, Atlantic connection of Devonian of 573 



Grouping of stratigraphic units in southeastern North America. . 608 



Guelph dolomite . . 28 



Guide fossils 509 



Gulf invasions, Diagram of 346 



Gulf of Mexico invasions 486 



Map of 368 



Gulf Stream, Reputed scour of 362 



Gyronema 660 



sp 664 



Hale sandstone . . 29 



Hall, James, on classification of Paleozoic 375 



use of term Black River 391 



Hamilton fauna, Recurrence of 515 



shale . # 28 



submergence 497 



Hannibal shale 426 29 



